Deflector for close coupled oil burners



April 23, 1940.

R. F. ANDLER ET AL ,9 2 DEFLECTOR FOR CLOSE COUPLED OIL BURNERS FiledJuly 20, 1937 2 Sheets-Sheet 1 ATTORNEY.

April 23, 1940. R. F. ANDLER ET AL DEFLECTOR FOR CLOSE COUPLED OILBURNERS ul y 20, 1937 2 Sheets-Sheet 2 Filed J 3 NvENTgfi Mrg ATTORNEY.

Patented Apr. 23, 1940 UNITED STATES DEFLECTOR. on CLOSE COUPLED OILBURNERS Robert F. Andler, Rutherford, and Louis W.

Schroeder, Passaic, N. J., assignors to Electrol Incorporated, Clifton,N.

Delaware J., .a corporation of Application July 20, 1937, Serial No.154,548

4 Claims.

: much as possible and eliminate as many parts as can be done withoutdisturbing the efficiency or interfering with the proper combustion. In

burners of this type it has been customary to discharge the air from theblower into an air duct which has suflicient length to cause the air toproceed around the scroll case of the air receiver as a solid circularcolumn of air. As this solid column of air proceeded in the evernarrowing scroll, air was forced into the blast tube uniformly aroundits circumference, thus giving a symmetrical fire. In an endeavor to doaway with the air duct we directly connected the blower housing to theair receiver as shown inthe copending application of Robert F. Andler,Serial No. 153,714 filed July 15, 1937, but we found that the airleaving the fan had various directions and eddy-currents, and the airwhen entering the air receiver would flow directly from the flange orinlet into the air receiver in more or less straight lines, withouttaking the proper whirling direction around the scroll case. Due to thefact that this air entered the blast tube tangentially, there was aslight amount of rotation, but the air stream was not uniform and thegreater amount of air affected the right side of the flame, making itshort, while the left side of the flame, not receiving sufficient air,was long and smoky. In a close coupled burner we have found that it isdesirable to provide a projection on the inlet port. This has the effectof directing the air stream to the outer periphery of the scroll.

The object of our invention is to provide means which will permit thedirect connection of the air receiver to the blower housing yet producean air stream of uniform velocity and thus ensure a symmetrical flame.

Our means of accomplishing the foregoing ob- .ject may be more fullycomprehended by having reference to the accompanying drawings, which arehereunto annexed and are a part of this specification and in which:

Fig. 1 is a front elevation of an oil burner employing our improveddeflector, a portion being shown in section;

Fig. 2 is a side elevation of the same;

Fig. 3 is a detail view of the scroll case and air tube showing ourdeflector in dotted lines;

Fig. 4 is a detail view of scroll case and air tube partly broken awayshowing our deflector in end elevation;

Fig. 5 is a detail view of the scroll case and air tube showing indotted lines our deflector in perspective. I g Similar referencenumerals refer to similar parts throughout the entire specification.

As shown in the drawings the fan or blower l is directly connected to anelectric motor 2 in the customary manner. The flange 3 of the blowerhousing is directly connected to a flange 4 formed on the blast tube 5thus forming an air inlet port 4' which leads into the said tube 5tangentially. This as stated imparted a whirling or gyrating movement tothe air stream notwithstanding the fact that this air was whirling orgyrating, yet the movement of the air stream was not uniform. Wediscovered'that by placing a deflector 6 on the inside of the best tube5 that it would interrupt the high velocity stream and slightly changethe angle of advancement of a portion of this stream in such a mannerthat when the gyrating annulus reached the end of the blast or air tube,it was uniform in velocity and the fire was symmetrical. This deflector6 is mounted inside of the blast tube 5, being secured by a cap screw 1,which passes through a slot 8, formed in the wall of the blast tube 5,as clearly shown in Figs. 3 and 5 of the drawings, as more clearly seenin the detail views consists of a curved member, square or rectangularin cross section, formed in a segment of a helix and curved to coincidewith the curvature of the inside of the blast tube. It may be secured tothe blast tube in any suitable or convenient manner as desired. Itshould be located approximately midway of the length of the blast tube.It may be found desirable in some situations to have the deflector 6adjustable to meet varying conditions. This can be done by means of anadjusting screw as clearly seen in Fig. 5. We have found in practicethat the provision of the deflector 6 in the air tube 5 will ensure auniform velocity of the air stream without in any manner interferingwith the proper combustion and will produce a very symmetrical flame inthe combustion chamber.

Having described our invention, what we regard as new and desire tosecure by Letters Patent 1. In a close coupled oil burner having ablower, a blast tube directly connected thereto, an oil supply tube insaid blast tube, a nozzle on said supply tube'positioned to discharge anoil spray from the blast tube, said blast tube being directly andtangentially connected to the discharge of said blower to cause the airstream to assume a gyratin g annular form in the blast tube; and asingle deflector secured to the inner surface of said blast tube, saiddeflector being square in cross section, curved to conform to thecurvature of the blast tube and formed as a segment of a helix whichextends partially around the wall of said tube.

2. In a close coupled oil burner having a blower, a blast tube directlyconnected thereto, an oil supply tube in said blast tube, a nozzle onsaid supply tube positioned to discharge an oil spray from the blasttube, said blast tube being directly and tangentially connected to thedischarge of said blower to cause the air stream to assume a gyratingannular form in the blast tube; a single deflector secured to the innersurface of said blast tube, said deflector being square in crosssection, curved to conform to the curvature of the blast tube and formedas a segment of a helix which extends partially around the wall of saidtube, and adjustable means to secure the deflector in position in saidblast tube.

3. In a close coupled oil burner, having a blower, a blast tube directlyconnected thereto, an oil supply tube in said blast tube, a nozzleonsaid supply tube positioned to discharge an oil spray from the blasttube, said blast tube being connected directly and tangentially to thedischarge of said blower to cause the air stream to assume a gyratingannular form in the blast tube; and a single deflector secured to theinner surface of said blast tube, said deflector being curved to conformto the curvature of said tube and formed as a segment of a helix whichextends partially around the wall of said tube.

4. In a close coupled oil burner having a blower, a blast tube directlyconnected thereto, an oil supply tube in said blast tube, a nozzle onsaid supply tube positioned to discharge an oil spray from the blasttube, said blast tube being connected directly and tangentially to thedischarge of said blower to cause the air stream to assume a gyratingannular form in the blast tube; and a single means curved to conform tothe curve of the blast tube secured to the inner surface thereof, saidcurved means being shaped to form a segment of a helix which extendspartially around the wall of said tube and a cap screw to secure saidmeans in place, said screw passing through aslot'formed in the blasttube whereby the position of the said means can be altered.

ROBERT F. ANDLER. LOUIS W.SC'HROEDER.

